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- From: rubio@pine.circa.ufl.edu (RUBIO)
- Newsgroups: sci.physics
- Subject: two point masses in an expanding universe
- Message-ID: <38145@uflorida.cis.ufl.edu>
- Date: 5 Jan 93 17:47:49 GMT
- Sender: news@uflorida.cis.ufl.edu
- Reply-To: rubio@pine.circa.ufl.edu
- Organization: University of Florida (ufl.edu)
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-
-
- This is a simple question that bothers me a lot:
-
- Imagine there are two (point) masses separated by a finite distance in an
- expanding universe. The distance between the two masses increases and so
- does their (relative) velocities, both of which imply that the energy of
- one of them with respect to the other is increasing.
-
- This energy is, therefore, not conserved. Where does it come from (go?)?
- Is it the energy from the expansion? I would appreciate any comments. I've
- already looked at the FAQ but it didn't help.
-
- This is a closed system, (for simplicity I'll make the space closed in the
- spacetial sense). The Super-Hamiltonian vanishes (therefore it's conserved).
- After I "gauge" the theory I end up with a non-conserved energy. This
- implies the energy is going into the gauged degrees of freedom. Doesn't it?
-
- Thanks for any help. Even flames will be nice (I hate it when I don't get
- any reponses).
-
- -jose a. rubio-
-